Automobile Engineering MCQ Questions & Answers | Mechanical Engineering

The function of anti-lock brake system (ABS) is that isThe function of anti-lock brake system (ABS) is that is Maintains directional control during braking by preventing the wheels from locking
An anti-lock braking system is a safety anti-skid braking system used on aircraft and on land vehicles.
ABS operates by preventing the wheels from locking up during braking, thereby maintaining tractive contact with the road surface

Brake fluid is subjected to very high temperatures, especially in the wheel cylinders of drum brakes and disk brake calipers. It must have a high boiling point to avoid vaporizing within the lines.
Low viscosity
Compatibility with rubber and metal parts

Wheel base of a vehicle is the Distance between the centres of the front and rear wheels

The negative plates of a lead-acid battery are made of spongy lead (Pb).

This spongy form increases the surface area for chemical reactions and plays a vital role in the battery’s ability to discharge and recharge efficiently.

Why the other options are incorrect:

Option A: Lead peroxide (PbO₂)
This is incorrect because lead peroxide is found on the positive plate of a lead-acid battery, not the negative. It acts as the active material for the positive electrode during the chemical reactions.

Option C: Lead sulphate (PbSO₄)
This is incorrect because lead sulphate forms on both the positive and negative plates during discharge, but it is not the original material of either plate. It is a product of the chemical reaction between the plate materials and sulfuric acid.

Option D: Sulphuric acid (H₂SO₄)
This is incorrect because sulphuric acid is the electrolyte in a lead-acid battery, not a material used in the plates themselves. It facilitates the movement of ions and participates in the chemical reactions, but it is not part of the negative plate.

Therefore, the correct answer is Option B: Spongy lead (Pb).

The positive plates of a lead acid battery has lead peroxide (PbO₂).

The function of any transmission is transferring engine power to the driveshaft and rear wheels .
Gears inside the transmission change the vehicle's drive-wheel speed and torque in relation to engine speed and torque

The stroke of an engine is the Distance between T.D.C. and B.D.C.

The seat belt tensioners are built in the Seat belt retractors

The basic part of the engine to which the other engine parts are attached or assembled is the cylinder block
An engine block is the structure which contains the cylinders, and other parts, of an internal combustion engine. In an early automotive engine, the engine block consisted of just the cylinder block, to which a separate crankcase was attached.

The natural gas is compressed in a CNG cylinder at a pressure of 200bar